Detection arrangements for X-ray security systems

Details Detection arrangements for X-ray security systems Detection arrangements for X-ray security systems

1982-12-27

1987-02-17

Church, Craig E.

X-ray or gamma ray systems or devices

Beam control

Scanner

378 57, G03B 4116

Patent

active

046445781

ABSTRACT:
The present invention provides an improvement to a digital system for reading out image information of items passing on a conveyor belt through an X-ray fan-beam. The improvement involves an oscillating screen or mask moving between the items and detector elements with the mask having openings in registration with at most one half of each of several detector elements. The mask oscillates over the detector elements to expose alternate portions of the radiation detecting surface of each of the detector elements to the incident X-rays.

REFERENCES:
patent: 3944833 (1976-03-01), Hounsfield
patent: 4179100 (1979-12-01), Sashin
patent: 4433427 (1984-02-01), Barnea

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